Journal
ANALYST
Volume 138, Issue 7, Pages 2090-2095Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3an36485b
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Funding
- National Basic Research Program of China (973 Program) [2013CB934301]
- National Natural Science Foundation of China [NSFC 21075077]
- Shandong Provincial Natural Science Foundation for Distinguished Young Scholar [JQ201004]
- Independent Innovation Foundation of Shandong University [IIFSDU-2012JC027]
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Silver nanoparticles (AgNPs) decorated filter papers combining solid-phase extraction (SPE) with surface enhanced Raman spectroscopy (SERS) achieved rapid collection of analytes and in situ detection. The AgNPs were fabricated by cellulose self-sacrificing reduction. Aqueous Ag(NH3)(2)OH was reduced by hydroxyl groups in cellulose under alkaline conditions. The AgNPs were highly uniform and firmly adhered to the microfibers. Reaction conditions were optimized by the probe molecule p-aminothiophenol (PATP) to attain the best Raman enhancement. Methylene blue trihydrate (MB) and 6-thioguanine (6-TG) were detected by flow-through method. The results exhibited outstanding SERS effect and an obvious improvement in detection limit was observed compared to common immersion methods. SERS detection was quantitative as the log-log plot of Raman intensity against MB and 6-TG concentrations showed a linear relationship. The SERS-active paper is degradable because it could be burned after analyte detection.
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